4-chloro-5-methyl-2,3-dihydropyridazin-3-one CAS 1638764-84-7
| CAS No. | 1638764-84-7 |
| Molecular Formula | C5H9ClN2O |
| Molecular Weight | 148.59 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-chloro-5-methyl-2,3-dihydropyridazin-3-one (CAS 1638764-84-7), a certified reference material (molecular formula C5H9ClN2O, MW 148.59 g/mol) for analytical method development and quality control.
Based on its molecular formula C5H9ClN2O, 4-chloro-5-methyl-2,3-dihydropyridazin-3-one contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 148.59 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-chloro-5-methyl-2,3-dihydropyridazin-3-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H9ClN2O |
| Molecular Weight | 148.59 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloro Standards
- 6-chloro-2-methyl-2,3-dihydropyridazin-3-one (CAS 10071-38-2)
- 6-chloro-3-methyl-pyrimidin-4-one (CAS 101079-62-3)
- 2-(4-chloro-1H-pyrazol-1-yl)acetaldehyde (CAS 1015939-57-7)
- 6-chloro-3-methyl-1H-pyrazin-2-one (CAS 105985-19-1)
- 5-chloro-1-methyl-pyrazole-4-carbaldehyde (CAS 117007-77-9)
- 2-(5-chloro-1H-pyrazol-1-yl)acetaldehyde (CAS 1260642-65-6)
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Recommended Standards
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- 6-Chloro-2-methylpyrimidin-4-ol (CAS 17551-52-9)
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